JavaIO-2nd Edition By Elliotte Rusty Harold

调用h2数据库管理用户注册，实现网上书城，购物车管理等功能(Call H2 database to manage user registration, realize online bookstore, shopping cart management and other functions)

txt版 超级方便 可放到手机或mp4上阅读(txt version of super-convenient place to read cell phone or mp4)

说明：  这是一个基于java的基础程序，对java的初学者很有帮助，尤其是对java语法的提高很有帮助。(This is a java program based on the basis for the beginners java help, especially in java syntax to improve very helpful. )

说明：  springboot启动文件,初始化项目(springboot start file)

说明：  简单的乌龟与兔子赛跑程序，显示两个画面动态追逐效果(The tortoise and the hare race simple procedure, the dynamic pursuit of the screen displays two results)

httpclient 连接池 请求 需要连接池的jar包(httpclient connection pool connection pool request requires jar package)

java+mysql+tomcat 开发的程序 用户管理(java+mysql+tomcat procedures developed user management)

The method setPrefix raises a INVALID_CHARACTER_ERR if the specified prefix contains an illegal character.

一个用于实现不同数据库数据同步的程序，用jbuider开发，在一个数据库数据修改后，通过触发器触发同步程序，同步程序通过socket与另一个数据库的同步程序通信，达到数据同步的目的(One for different database data synchronization process, using jbuider development, data modifications in a database after the synchronization process through the flip-flop trigger, synchronization procedure socket with another database synchronization process communication, to achieve the purpose of data synchronization)

自己学习过程中做的计算器，还在修改,只实现了基本的算数功能，并且可能还存在BUG(The calculator that i do in the course of my study is still changing)